V2X Idle State Data Transmission via Pre-Allocated Resources
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Solution Overview
Problem
Vehicle-to-everything (V2X) communication systems face challenges in maintaining data transmission and reception without re-establishing a connection with the base station, particularly due to complex reconnection procedures and limited resources, especially during frequent inter-cell handovers and high mobility, which can lead to signaling overhead and resource constraints.
Innovation Solution
A method for a device to transmit and receive data with a base station in a V2X service system by establishing a link, entering an idle state, and using either a resource allocated by the base station or a contention-based resource for message transmission, based on conditions such as message type, size, energy level, and mobility, allowing data transmission even when disconnected from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device re-establishes connection with the base station to transmit data after connection release, then data transmission reliability is improved, but connection procedure complexity and signaling overhead increase
Solution Approach 1:
The patent segments the connection state into multiple levels: connected state, idle state with reserved resources, and idle state without reserved resources. This allows the device to maintain a simplified connection procedure by transitioning between these segments based on data transmission needs, avoiding full reconnection while maintaining reliability.
Solution Approach 2:
The base station performs preliminary action by pre-allocating uplink resources to the device before connection release. This allows the device to immediately transmit data in idle state without going through complex reconnection procedures, while ensuring reliability through pre-configured resources.
2Reliability
If a device performs frequent inter-cell handover to maintain connection, then connection reliability is improved, but signaling overhead and resource consumption increase
Solution Approach 1:
The patent extracts the essential function of connection maintenance from the full connection state. By allowing data transmission in idle state with pre-allocated resources, it separates the data transmission function from the connection state requirement, eliminating the need for frequent handovers while maintaining reliability.
Solution Approach 2:
The patent introduces dynamic resource allocation where the base station can allocate uplink resources to idle devices based on their data transmission needs. This dynamic approach allows the device to maintain reliability through resource availability without the static requirement of maintaining a full connection, reducing handover frequency and signaling overhead.
3Speed
If the base station allocates dedicated uplink resources to idle devices, then data transmission speed is improved, but resource consumption increases
Solution Approach 1:
The patent makes uplink resources universal by allowing them to serve multiple purposes: dedicated allocation for high-speed transmission when needed, and contention-based access for normal transmission. This multi-functionality allows the same resource pool to support both speed-critical and resource-efficient scenarios.
Solution Approach 2:
The patent changes the resource allocation parameter from fixed dedicated allocation to flexible dynamic allocation. The base station adjusts the allocation strategy based on device conditions, message characteristics, and network status, switching between dedicated and contention-based access to optimize the balance between transmission speed and resource consumption.
Data Source
AI summary
The present invention relates to a method and apparatus for transmitting or receiving data with a base station by a device in a wireless communication system supporting a vehicle to everything (V2X) service. The present invention provides a method and apparatus for establishing a V2X link for transmitting or receiving a message with the base station, entering into an idle state, and transmitting, on the basis of a specific condition in the idle state, a message through a first resource allocated by the base station or a second resource for contention-based transmission to the base station.